Coexistence of the relaxor-like and ferroelectric behavior in K1-xLixTaO3

Trybula Z.; Dec J.; Miga S.; Los Sz.; Trybula M.

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Coexistence of the relaxor-like and ferroelectric behavior in K1-xLixTaO3

机译：K1-xLixTaO3中类似弛豫和铁电行为的共存

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The results of low-temperature linear and nonlinear susceptibilities, polarization measurements and the dc electric field dependence of the dielectric properties of the lithium-doped potassium tantalate K1-xLixTaO3, x = 0.034 (KLT-3.4%Li) solid solution are presented. The coexistence of the relaxor-like and ferroelectric behavior and different mechanisms leading to either of them are discussed. The observed ferroelectric phase transition is of the first-order type with temperature hysteresis. This transition is due to the off-center motions of Ta ions in the octahedral environment of oxygen ions. Clusters of Li+ ions produce a relaxor-like behavior and random electric field. This field reduces the depolarization field and allows off-center motions of Ta ions and an appearance of spontaneous polarization.

机译：给出了掺杂锂的钽酸钾钾K1-xLixTaO3，x = 0.034（KLT-3.4％Li）固溶体的低温线性和非线性磁化率，极化测量结果以及直流电场依赖性的结果。讨论了类弛豫和铁电行为的共存以及导致它们中任一个的不同机制。观察到的铁电相变是具有温度滞后的一阶类型。这种转变归因于Ta离子在氧离子的八面体环境中的偏心运动。 Li +离子簇产生类似弛豫的行为和随机电场。该场减小了去极化场，并允许Ta离子偏心运动和出现自发极化。

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来源
《Phase Transitions》 |2016年第8期|共9页
作者
Trybula Z.; Dec J.; Miga S.; Los Sz.; Trybula M.;
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正文语种 eng
中图分类物理学;
关键词
Doped incipient ferroelectrics; linear and nonlinear susceptibilities; potassium tantalate; ferroelectric phase transitions; relaxors;

机译：掺杂初期铁电体;线性和非线性磁化率;钽酸钾;铁电相变;弛豫;

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Coexistence of the relaxor-like and ferroelectric behavior in K1-xLixTaO3

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